This spell summons a succubus (or incubus) to give you "unimaginable delights". This is naturally, having your choice of mashed, fried, or baked potato.

The succubus cannot be killed, and, should you try you will become possessed and be hurt or even killed. The succubus (or incubus) disappears once you make your choice.

 

The potato can be bought from various vegetable shops around the Disc.